Question

Please need help
(s + 12) + (3s - 8)

Answer 1

Can you solve it if I write the same thing like this ?

s + 12
3s - 8
=========


The piece on the left is
s
3s
====
4s .

The piece on the right is
12
- 8
====
4 .

Write the pieces together again, and you have

4s + 4

Answer 2

s+12+3s−8=
s+12+3s+−8
Combine Like Terms
s+12+3s+−8=
(s+3s)+(12+−8)=
4s+4